Heat-interchanging device



LE ROY BROWN, HEAT INTERCHANGING DEVICE. APPLICATION map SEPT.2I, 191a.

Patented Feb. 8, 1921.

UNITED STA'IJE' S PATENT OFFICE.

HEAT-INTERCHANGING DEVICE.

Application filed September 21, 1918.

To all whom it may concern:

Be it known that I, Ln ROY BROWN, of the city of Sault Ste. Marie, inthe district of Algoma, in the Province of Ontario, Canada, haveinvented certain new and useful Improvements in Heat-InterchangingDevices, of which the following is the specification.

My invention relates to improvements in heat interchanging devices andthe ob ect of the invention is to devise simple rapid means for eithercooling or heating various kinds of fluids whether in the form of aliquid or gas or in a semi-fluid state and it consists essentially of aseries of parallel channels through which the fluid to be cooled passes,such channels being separated by intervening spaces through which thecooling medium flows as hereinafter more particularly explained.

Figure 1, is a longitudinal section through my device arranged forcooling or heating fluids passed therethrough under pressure or vacuum.

Fig. 2, is a sectional view on line my Fig. 1.

Fig. 3, is a sectional view on line my' Fig. 1.

Fig. at, is a perspective detail of one of my unit members.

Fig. 5, is a longitudinal sectional view through my cooling devicearranged for cooling oil with water where both are at atmosphericpressure.

In the drawings like characters of reference indicate correspondingparts in the various figures.

I will first refer to Figs. 1 to at inclusive.

1 indicates a casing comprising a lower casing member 1*, anintermediate casing member 1 and an upper casing member 1 The lowermember 1- is provided with an in let 1 and an outlet 1*. The uppercasing member is provided with an inlet 1 and an outlet 1 Theintermediate casing member is provided with an inlet 1 and an out} let 1The liquid to be cooled is fed through the inlets 1 and 1 and passed outfrom the outlets 1* and 1". The cooling medium passes into the devicethrough the Specification of Letters Patent.

Patented Feb. 8, 1921.

Serial No. 255,126.

inlet 1 and let 1'.

In order to separate the liquid to be heated or cooled from the fluidforming the temperature changing medium I have provided the followingdevice.

Within the upper and lower casing members I and 1 is located the memberillustrated in Fig. at. This member comprises a rectangular plate member2 provided with a series of parallel slots 3 from which depend hollowflanges l extending paral lel one to the other, the side walls of whichmay be either vertical or slightly inclined so asto taper toward theouter end of the flange as shown in Fig. at. The flange-like portion 2*formed by the edge of the plate 2 extending beyond the depending flanges-l: rests, when inserted in the lower unit 1", upon the top edge of suchunit so that the flanges depend into the casing member. hen in thisposition it will be seen that a plurality of parallel channels areformed extending longitudinally of the casing member 1 between each ofthe depending flanges t and through which the fluid to be cooled passesas it travels from the inlet 1 to the outlet 1. Upon the flange 2*resting upon the upper edge of the casing member 1 rests an out-turnedflange 1 of the central member 1. The flange of the lower casing member1 and flange 2 and flange 1 are'suitably secured together. The up peredge of the central casing member 1 is provided with an out-turnedflange 1 Upon the out-turned flange 1 rests the outturned flange 2 ofthe upper member 2 and upon the flange 2* of the upper member 2 reststhe out-turned flange of the upper casing member 1 These flanges arealso suitably connected together. By this means parallel channels arealso formed in the upper casing member 1 through which the fluid to becooled passes as it travels from the inlet .1 to the outlet 1. Thecooling medium which passes through the inlet 1 enters the centralportion of the device formed by the member 1 and passes into theinterior of the hollow flanges 4.

passes out through the out- .It will thus be seen that the fluid to becooled passes against the outside face of the Walls of the hollowflanges 4 and the cooling fluid passes against the inside face of thewalls of the hollow flanges 4 thereby providing for heat transfer, thefluid passing into the interior of the flanges if of lower temperaturethan the fluid to be cooled serves to lower the temperature of suchfluid, the heat transfer being effected through the walls of the flanges4t. Similarly if it is designed to raise the temperature of the fluidpassed to the upper and lower casing members 1* and 1 the fluid passinto the hollowflanges of the lower cooling unit 2. The batfle plate 7is provided with tongues of a similar nature which extend respectivelyinto the hollow flanges 4 of the upper and lower units 2. Cross plates 9are also provided extending between the bafiie plate 5 and the end wallof the middle unit casing'l'.

By this means the cooling or heating fluid which is fed through theinlet 1 is distributed by the baffle 7. Part is directed into the upperhollow flanges 4 and part into the lower hollow flanges 4. The remainderpasses through slots opposite the inlet. Part of the fluid passesbeneath the baffle plate 6, and part above. Convectioncurrents willcause the warmer portion of the cooling medium to rise and the battle 5is arranged so that only the upper and warmer portion of the coolingmedium will find its way through the outlet 1 Inorder to distribute theoil or other fluid to be cooled so thatit passes evenly through theparallel channels formed by the flanges 4 I have provided perforatedplates 10 which extend against the ends of the flanges at the inlet endof the temperature interchange unit. At the opposite ends of theflangesI have provided plates 11 which allow the fluid which has eitherbeen heated or cooled to the greatest extent to pass off through theoutlets 1 and l. lWhenever a fluid that contains a gas in solution orthat gives off vapor, is passed through the interior of the hollowflanges, a gas release will be necessary at the top of each hollowflange.

In Fig; 5 I have illustrated my device adapted for cooling fluids whichare fed under atmospheric pressure. In the device as arranged in F 5 Ionly employ the lower casing member modified as illustrated in Fig. land the flanged member 1 and member 2 modified, the upper member 1 beingdispensed with. In the hollow flanged member 2 shown in Fig. 5 theflange like portion 2* is dispensed with and the sides are carriedvertically upward'to form an open top box, in the ends of which theinlet andontlet are placed.

13 indicates the inlet through which water-is passed to the interior ofthe unit.

12 indicates the outlet through which water is discharged. In thisfigure the outer casing 14 is preferably longer than the member 2 and isprovided at the inlet end with a perforated wall A forming a compartment 14" into which oil is fed from a valve 15 which is controlled by afloat 16. The oil is fed into the compartment 14, passes through theperforated wall let and flows longitudinally between the flanges of themember 2. At the opposite end of the easing is a cross wall 14 forming aweir. Between this weir and the end of the unit 2 is a wall 143. Thiswall battles the warmer fluid which by convection finds its way upwardand allows the cooler fluid from the bottom to rise and overflow, theweir passing out through the discharge orifice 17.

From this description it will be seen that I have devised a very simpledevice whereby a heat interchange may be effected between variousfluids, such heat interchange being accomplished rapidly andefficiently. Also it will be seen that I have devised a simple meanswhereby both'extcrior and intcrior walls of the unit may be quickly exposed for cleaning purposes.

In certain cases where the fluid is of such a consistency that it has atendency to cling to the walls of the flanges it may be necessary toemploy scrapers. I do not illustrate or describe these in detail as theymay be of any suitable construction commonly used in other devices.

lVhat I claim as my invention is:

1. A heat interchanging device comprising a casing having an inlet atone end and an outlet at the opposite end, a member sup ported upon theupper edge of the open top 3 of the casing and provided with a series ofparallel depending hollow flanges extending longitudinally of the casingand between which the fluid passes from the inlet to the outlet of thecasing, a perforated plate extending over the ends of the flanges at theinlet end, and means for feeding a temperature interchange fluid intoand through the hollow flanges.

'2; A heat interchanging device comprising a casing having an inlet atone end and an outlet at the opposite end, a member supported upon theupper edge of the open top of the casing and provided with a series ofparallel depending hollow flanges extending longitudinally of the casingand between which the fluid passes from the inlet to the outlet of thecasing, means for feeding a temperature interchange fluid into andthrough the hollow flanges, and means for directing the flow of the heatinterchange fluid medium into the interior of the hol- Vitnesses R.ROSSITER, D. G. MAoGREeoR.

L. R. BROWN.

